[asked about synchronized presentation of sight/sound/text of a
speech, for example]
The W3C is working on a way to do this via the Synchronized Multimedia
Integration Language (SMIL). The WAI-PF group has been working with
the SYMM group on access-related issues, see
<http://www.w3.org/WAI/PF/SMIL/> for some further information.
This is being used in the next-generation talking book technology
under development by the DAISY consortium. There was a session at
CSUN about this. Check at
<http://www.dinf.org/csun_98/csun98.htm> for more information.
Al Gilman